goodroi - 6:01 pm on Dec 21, 2011 (gmt 0)
It might be more noticeable now but this is not new. I have lost count the different ways I have seen reviews being faked. Google does have some safeguards in place but if you are creative enough you can get around them.
If you are not experienced I would beg you to think twice before playing around with this. Most inexperienced (and even some experienced) people end up causing themselves more harm then good when taking these shortcuts.